Improvement in lifting-jacks



PATENT OFFICE.

AARON HIGLEY, OF SOUT'H BEND, INDIANA.

IMPROVEMENT IN LlFTING-JACKS.

Specification forming part of Letters Patent No. 55,102, dated May 29,1866.

fo all whom it may concern.-

Be it known that I, A. IllGLEY, of South Bend, in the county of St.Joseph and State ofIndiana, have invented certain new and use fulImprovements in Lifting-Jacks; and I do hereby declare that thefollowing is a full and complete description of the construction andoperation of the same, reference being had to the accompanying drawings,making a part of this specilica-tion, in which- Figure l is aperspective view. Fig. 2 is a side view.

Like letters of reference refer to like parts in the views.

My improvement relates to lifting-jacks, as hereinafter described, beingan. improvement on a patent granted to me October 31, 1865.

In the drawings, A is the base that supports the standard A' and leverB. The head ot' this lever is connected to the base A by means of ashaft, a, passing through the eyes of two staples, a', on the base,these staples being connected to the top of said base, thus forming thefnlcrum or pivot ofthe lever B. Passing round the head of the lever is astrap, b, for the purpose of strengthening it.

c is a plate, one on each side of t-he lever, to which plates the headof the standard A' is pivoted, as shown at c'. The head of the lever iscored out to receive the end of the standard, and in which it rests torelieve the pivots c' from undue strain.

In the standard A is a groove in which the rack O moves, which rack isheld to the standard by means of bands C', that extend round thestandard and rack, as shown, said rack having a ratchet, D, the link D',hung to the top and back of the standard, catching in the ratchet andholding it in` place when it is raised up or let down, the dotted linesin Fig.

2 showing how far it can be raised up, the lip d catching against thelower band, C'.

When it is desired to use this jack the standard is placed under theaxle, the lever being in the position shown in Fig. l, and the rackraised up to the axle. The lever is then raised to the position seen inFig. 2, and the heft of the load will hold it there, not allowing it tobe thrown back, and it cannot go any farther forward, as it comesagainst the standard and the heft of the load is forward ot' thefulcrum.

When wagons are higher or lower the rack O can be raised or lowered tosuit the height. The higher the vwagon the higher the rack must beraised.

When the jack is in use the weight or pressure does not come on thepivots c' that hold the standard to the lever, but on the head of thelever, it being cored out to receive the head of the standard, and whichrests in said core when the leverl is raised up.

To the lower end of the standard A' are secured straps or plates E. Fromeach side extends a wrist, and by which means, in connection with theplates c, the standard is hinged or pivoted at c' to the head of thelever B.

What I claim as my improvement, and desire to secure by Letters Patent,is-

rIhe link D', pivoted to the standard A', and lever B, hinged to saidstandard by the straps E and plates c, and to the base A by the shaft aand staples a', in combination with the rack O and bands C', arranged asand for the purpose set forth.

AARON HIGLEY.

Witnesses:

J. B. ARNOLD, Jr., B. WALL.

